lepton

PRIMARY MEANINGS OF: lepton

1	n	100 lepta equal 1 drachma in Greece
2	n	an elementary particle that participates in weak interactions; has a baryon number of 0

FULL DEFINITIONS OF: lepton

Types:: show 8 types...; hide 8 types...; electron, negatron
an elementary particle with negative charge; mu-meson, muon, negative muon
an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino; neutrino
an elementary particle with zero charge and zero mass; tau-minus particle, tauon
a lepton of very great mass; delta ray
an electron ejected from matter by ionizing radiation; free electron
electron that is not attached to an atom or ion or molecule but is free to move under the influence of an electric field; photoelectron
an electron that is emitted from an atom or molecule by an incident photon; valence electron
an electron in the outer shell of an atom which can combine with other atoms to form molecules

Type of:: elementary particle, fundamental particle
(physics) a particle that is less complex than an atom; regarded as constituents of all matter; fermion
any particle that obeys Fermi-Dirac statistics and is subject to the Pauli exclusion principle

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